void _SplinePatchFullQuality(u8 *&dest, int &count, const SplinePatchLocal &spatch, u32 origVertType, int patch_cap) {
// Full (mostly) correct tessellation of spline patches.
// Not very fast.
// First, generate knot vectors.
int n = spatch.count_u - 1;
int m = spatch.count_v - 1;
float *knot_u = new float[n + 5];
float *knot_v = new float[m + 5];
spline_knot(n, spatch.type_u, knot_u);
spline_knot(m, spatch.type_v, knot_v);
// Increase tesselation based on the size. Should be approximately right?
// JPCSP is wrong at least because their method results in square loco roco.
int patch_div_s = (spatch.count_u - 3) * gstate.getPatchDivisionU() / 3;
int patch_div_t = (spatch.count_v - 3) * gstate.getPatchDivisionV() / 3;
if (patch_div_s <= 0) patch_div_s = 1;
if (patch_div_t <= 0) patch_div_t = 1;
// TODO: Remove this cap when spline_s has been optimized.
if (patch_div_s > patch_cap) patch_div_s = patch_cap;
if (patch_div_t > patch_cap) patch_div_t = patch_cap;
// First compute all the vertices and put them in an array
SimpleVertex *vertices = new SimpleVertex[(patch_div_s + 1) * (patch_div_t + 1)];
float tu_width = 1.0f + (spatch.count_u - 4) * 1.0f / 3.0f;
float tv_height = 1.0f + (spatch.count_v - 4) * 1.0f / 3.0f;
bool computeNormals = gstate.isLightingEnabled();
for (int tile_v = 0; tile_v < patch_div_t + 1; tile_v++) {
float v = ((float)tile_v * (float)(m - 2) / (float)(patch_div_t + 0.00001f)); // epsilon to prevent division by 0 in spline_s
if (v < 0.0f)
v = 0.0f;
for (int tile_u = 0; tile_u < patch_div_s + 1; tile_u++) {
float u = ((float)tile_u * (float)(n - 2) / (float)(patch_div_s + 0.00001f));
if (u < 0.0f)
u = 0.0f;
SimpleVertex *vert = &vertices[tile_v * (patch_div_s + 1) + tile_u];
vert->pos.SetZero();
if (origVertType & GE_VTYPE_NRM_MASK) {
vert->nrm.SetZero();
}
else {
vert->nrm.SetZero();
vert->nrm.z = 1.0f;
}
if (origVertType & GE_VTYPE_COL_MASK) {
memset(vert->color, 0, 4);
}
else {
memcpy(vert->color, spatch.points[0]->color, 4);
}
if (origVertType & GE_VTYPE_TC_MASK) {
vert->uv[0] = 0.0f;
vert->uv[1] = 0.0f;
}
else {
vert->uv[0] = tu_width * ((float)tile_u / (float)patch_div_s);
vert->uv[1] = tv_height * ((float)tile_v / (float)patch_div_t);
}
// Collect influences from surrounding control points.
float u_weights[4];
float v_weights[4];
int iu = (int)u;
int iv = (int)v;
spline_n_4(iu, u, knot_u, u_weights);
spline_n_4(iv, v, knot_v, v_weights);
// Handle degenerate patches. without this, spatch.points[] may read outside the number of initialized points.
int patch_w = std::min(spatch.count_u, 4);
int patch_h = std::min(spatch.count_v, 4);
for (int ii = 0; ii < patch_w; ++ii) {
for (int jj = 0; jj < patch_h; ++jj) {
float u_spline = u_weights[ii];
float v_spline = v_weights[jj];
float f = u_spline * v_spline;
if (f > 0.0f) {
int idx = spatch.count_u * (iv + jj) + (iu + ii);
SimpleVertex *a = spatch.points[idx];
vert->pos += a->pos * f;
if (origVertType & GE_VTYPE_TC_MASK) {
vert->uv[0] += a->uv[0] * f;
vert->uv[1] += a->uv[1] * f;
}
if (origVertType & GE_VTYPE_COL_MASK) {
vert->color[0] += a->color[0] * f;
vert->color[1] += a->color[1] * f;
vert->color[2] += a->color[2] * f;
vert->color[3] += a->color[3] * f;
}
if (origVertType & GE_VTYPE_NRM_MASK) {
vert->nrm += a->nrm * f;
}
}
}
}
if (origVertType & GE_VTYPE_NRM_MASK) {
vert->nrm.Normalize();
}
}
}
delete[] knot_u;
delete[] knot_v;
// Hacky normal generation through central difference.
if (gstate.isLightingEnabled() && (origVertType & GE_VTYPE_NRM_MASK) == 0) {
for (int v = 0; v < patch_div_t + 1; v++) {
for (int u = 0; u < patch_div_s + 1; u++) {
int l = std::max(0, u - 1);
int t = std::max(0, v - 1);
int r = std::min(patch_div_s, u + 1);
int b = std::min(patch_div_t, v + 1);
const Vec3Packedf &right = vertices[v * (patch_div_s + 1) + r].pos - vertices[v * (patch_div_s + 1) + l].pos;
const Vec3Packedf &down = vertices[b * (patch_div_s + 1) + u].pos - vertices[t * (patch_div_s + 1) + u].pos;
vertices[v * (patch_div_s + 1) + u].nrm = Cross(right, down).Normalized();
if (gstate.patchfacing & 1) {
vertices[v * (patch_div_s + 1) + u].nrm *= -1.0f;
}
}
}
}
// Tesselate. TODO: Use indices so we only need to emit 4 vertices per pair of triangles instead of six.
for (int tile_v = 0; tile_v < patch_div_t; ++tile_v) {
for (int tile_u = 0; tile_u < patch_div_s; ++tile_u) {
float u = ((float)tile_u / (float)patch_div_s);
float v = ((float)tile_v / (float)patch_div_t);
SimpleVertex *v0 = &vertices[tile_v * (patch_div_s + 1) + tile_u];
SimpleVertex *v1 = &vertices[tile_v * (patch_div_s + 1) + tile_u + 1];
SimpleVertex *v2 = &vertices[(tile_v + 1) * (patch_div_s + 1) + tile_u];
SimpleVertex *v3 = &vertices[(tile_v + 1) * (patch_div_s + 1) + tile_u + 1];
CopyQuad(dest, v0, v1, v2, v3);
count += 6;
}
}
delete[] vertices;
}
static void SplinePatchFullQuality(u8 *&dest, u16 *indices, int &count, const SplinePatchLocal &spatch, u32 origVertType, int quality, int maxVertices) {
// Full (mostly) correct tessellation of spline patches.
// Not very fast.
float *knot_u = new float[spatch.count_u + 4];
float *knot_v = new float[spatch.count_v + 4];
spline_knot(spatch.count_u - 1, spatch.type_u, knot_u);
spline_knot(spatch.count_v - 1, spatch.type_v, knot_v);
// Increase tesselation based on the size. Should be approximately right?
int patch_div_s = (spatch.count_u - 3) * spatch.tess_u;
int patch_div_t = (spatch.count_v - 3) * spatch.tess_v;
if (quality > 1) {
patch_div_s /= quality;
patch_div_t /= quality;
}
// Downsample until it fits, in case crazy tesselation factors are sent.
while ((patch_div_s + 1) * (patch_div_t + 1) > maxVertices) {
patch_div_s /= 2;
patch_div_t /= 2;
}
if (patch_div_s < 2) patch_div_s = 2;
if (patch_div_t < 2) patch_div_t = 2;
// First compute all the vertices and put them in an array
SimpleVertex *&vertices = (SimpleVertex*&)dest;
float tu_width = (float)spatch.count_u - 3.0f;
float tv_height = (float)spatch.count_v - 3.0f;
// int max_idx = spatch.count_u * spatch.count_v;
bool computeNormals = spatch.computeNormals;
float one_over_patch_div_s = 1.0f / (float)(patch_div_s);
float one_over_patch_div_t = 1.0f / (float)(patch_div_t);
for (int tile_v = 0; tile_v < patch_div_t + 1; tile_v++) {
float v = (float)tile_v * (float)(spatch.count_v - 3) * one_over_patch_div_t;
if (v < 0.0f)
v = 0.0f;
for (int tile_u = 0; tile_u < patch_div_s + 1; tile_u++) {
float u = (float)tile_u * (float)(spatch.count_u - 3) * one_over_patch_div_s;
if (u < 0.0f)
u = 0.0f;
SimpleVertex *vert = &vertices[tile_v * (patch_div_s + 1) + tile_u];
Vec4f vert_color(0, 0, 0, 0);
Vec3f vert_pos;
vert_pos.SetZero();
Vec3f vert_nrm;
if (origNrm) {
vert_nrm.SetZero();
}
if (origCol) {
vert_color.SetZero();
} else {
memcpy(vert->color, spatch.points[0]->color, 4);
}
if (origTc) {
vert->uv[0] = 0.0f;
vert->uv[1] = 0.0f;
} else {
vert->uv[0] = tu_width * ((float)tile_u * one_over_patch_div_s);
vert->uv[1] = tv_height * ((float)tile_v * one_over_patch_div_t);
}
// Collect influences from surrounding control points.
float u_weights[4];
float v_weights[4];
int iu = (int)u;
int iv = (int)v;
// TODO: Would really like to fix the surrounding logic somehow to get rid of these but I can't quite get it right..
// Without the previous epsilons and with large count_u, we will end up doing an out of bounds access later without these.
if (iu >= spatch.count_u - 3) iu = spatch.count_u - 4;
if (iv >= spatch.count_v - 3) iv = spatch.count_v - 4;
spline_n_4(iu, u, knot_u, u_weights);
spline_n_4(iv, v, knot_v, v_weights);
// Handle degenerate patches. without this, spatch.points[] may read outside the number of initialized points.
int patch_w = std::min(spatch.count_u - iu, 4);
int patch_h = std::min(spatch.count_v - iv, 4);
for (int ii = 0; ii < patch_w; ++ii) {
for (int jj = 0; jj < patch_h; ++jj) {
float u_spline = u_weights[ii];
float v_spline = v_weights[jj];
float f = u_spline * v_spline;
if (f > 0.0f) {
#ifdef _M_SSE
Vec4f fv(_mm_set_ps1(f));
#else
Vec4f fv = Vec4f::AssignToAll(f);
#endif
int idx = spatch.count_u * (iv + jj) + (iu + ii);
/*
if (idx >= max_idx) {
char temp[512];
snprintf(temp, sizeof(temp), "count_u: %d count_v: %d patch_w: %d patch_h: %d ii: %d jj: %d iu: %d iv: %d patch_div_s: %d patch_div_t: %d\n", spatch.count_u, spatch.count_v, patch_w, patch_h, ii, jj, iu, iv, patch_div_s, patch_div_t);
OutputDebugStringA(temp);
DebugBreak();
}*/
SimpleVertex *a = spatch.points[idx];
AccumulateWeighted(vert_pos, a->pos, fv);
if (origTc) {
vert->uv[0] += a->uv[0] * f;
vert->uv[1] += a->uv[1] * f;
}
if (origCol) {
Vec4f a_color = Vec4f::FromRGBA(a->color_32);
AccumulateWeighted(vert_color, a_color, fv);
}
if (origNrm) {
AccumulateWeighted(vert_nrm, a->nrm, fv);
}
}
}
}
vert->pos = vert_pos;
if (origNrm) {
#ifdef _M_SSE
const __m128 normalize = SSENormalizeMultiplier(useSSE4, vert_nrm.vec);
vert_nrm.vec = _mm_mul_ps(vert_nrm.vec, normalize);
#else
vert_nrm.Normalize();
#endif
vert->nrm = vert_nrm;
} else {
vert->nrm.SetZero();
vert->nrm.z = 1.0f;
}
if (origCol) {
vert->color_32 = vert_color.ToRGBA();
}
}
}
delete[] knot_u;
delete[] knot_v;
// Hacky normal generation through central difference.
if (spatch.computeNormals && !origNrm) {
#ifdef _M_SSE
const __m128 facing = spatch.patchFacing ? _mm_set_ps1(-1.0f) : _mm_set_ps1(1.0f);
#endif
for (int v = 0; v < patch_div_t + 1; v++) {
Vec3f vl_pos = vertices[v * (patch_div_s + 1)].pos;
Vec3f vc_pos = vertices[v * (patch_div_s + 1)].pos;
for (int u = 0; u < patch_div_s + 1; u++) {
const int l = std::max(0, u - 1);
const int t = std::max(0, v - 1);
const int r = std::min(patch_div_s, u + 1);
const int b = std::min(patch_div_t, v + 1);
const Vec3f vr_pos = vertices[v * (patch_div_s + 1) + r].pos;
#ifdef _M_SSE
const __m128 right = _mm_sub_ps(vr_pos.vec, vl_pos.vec);
const Vec3f vb_pos = vertices[b * (patch_div_s + 1) + u].pos;
const Vec3f vt_pos = vertices[t * (patch_div_s + 1) + u].pos;
const __m128 down = _mm_sub_ps(vb_pos.vec, vt_pos.vec);
const __m128 crossed = SSECrossProduct(right, down);
const __m128 normalize = SSENormalizeMultiplier(useSSE4, crossed);
Vec3f finalNrm = _mm_mul_ps(normalize, _mm_mul_ps(crossed, facing));
vertices[v * (patch_div_s + 1) + u].nrm = finalNrm;
#else
const Vec3Packedf &right = vr_pos - vl_pos;
const Vec3Packedf &down = vertices[b * (patch_div_s + 1) + u].pos - vertices[t * (patch_div_s + 1) + u].pos;
vertices[v * (patch_div_s + 1) + u].nrm = Cross(right, down).Normalized();
if (spatch.patchFacing) {
vertices[v * (patch_div_s + 1) + u].nrm *= -1.0f;
}
#endif
// Rotate for the next one to the right.
vl_pos = vc_pos;
vc_pos = vr_pos;
}
}
}
GEPatchPrimType prim_type = spatch.primType;
// Tesselate.
for (int tile_v = 0; tile_v < patch_div_t; ++tile_v) {
for (int tile_u = 0; tile_u < patch_div_s; ++tile_u) {
int idx0 = tile_v * (patch_div_s + 1) + tile_u;
int idx1 = tile_v * (patch_div_s + 1) + tile_u + 1;
int idx2 = (tile_v + 1) * (patch_div_s + 1) + tile_u;
int idx3 = (tile_v + 1) * (patch_div_s + 1) + tile_u + 1;
CopyQuadIndex(indices, prim_type, idx0, idx1, idx2, idx3);
count += 6;
}
}
}
void TesselateSplinePatch(u8 *&dest, int &count, const SplinePatch &spatch, u32 origVertType) {
const float third = 1.0f / 3.0f;
if (g_Config.bLowQualitySplineBezier) {
// Fast and easy way - just draw the control points, generate some very basic normal vector substitutes.
// Very inaccurate but okay for Loco Roco. Maybe should keep it as an option because it's fast.
const int tile_min_u = (spatch.type_u & START_OPEN) ? 0 : 1;
const int tile_min_v = (spatch.type_v & START_OPEN) ? 0 : 1;
const int tile_max_u = (spatch.type_u & END_OPEN) ? spatch.count_u - 1 : spatch.count_u - 2;
const int tile_max_v = (spatch.type_v & END_OPEN) ? spatch.count_v - 1 : spatch.count_v - 2;
for (int tile_v = tile_min_v; tile_v < tile_max_v; ++tile_v) {
for (int tile_u = tile_min_u; tile_u < tile_max_u; ++tile_u) {
int point_index = tile_u + tile_v * spatch.count_u;
SimpleVertex v0 = *spatch.points[point_index];
SimpleVertex v1 = *spatch.points[point_index+1];
SimpleVertex v2 = *spatch.points[point_index+spatch.count_u];
SimpleVertex v3 = *spatch.points[point_index+spatch.count_u+1];
// Generate UV. TODO: Do this even if UV specified in control points?
if ((origVertType & GE_VTYPE_TC_MASK) == 0) {
float u = tile_u * third;
float v = tile_v * third;
v0.uv[0] = u;
v0.uv[1] = v;
v1.uv[0] = u + third;
v1.uv[1] = v;
v2.uv[0] = u;
v2.uv[1] = v + third;
v3.uv[0] = u + third;
v3.uv[1] = v + third;
}
// Generate normal if lighting is enabled (otherwise there's no point).
// This is a really poor quality algorithm, we get facet normals.
if (gstate.isLightingEnabled()) {
Vec3f norm = Cross(v1.pos - v0.pos, v2.pos - v0.pos);
norm.Normalize();
if (gstate.patchfacing & 1)
norm *= -1.0f;
v0.nrm = norm;
v1.nrm = norm;
v2.nrm = norm;
v3.nrm = norm;
}
CopyQuad(dest, &v0, &v1, &v2, &v3);
count += 6;
}
}
} else {
// Full correct tessellation of spline patches.
// Does not yet generate normals and is atrociously slow (see spline_s...)
// First, generate knot vectors.
int n = spatch.count_u - 1;
int m = spatch.count_v - 1;
float *knot_u = new float[n + 5];
float *knot_v = new float[m + 5];
spline_knot(n, spatch.type_u, knot_u);
spline_knot(m, spatch.type_v, knot_v);
int patch_div_s = gstate.getPatchDivisionU();
int patch_div_t = gstate.getPatchDivisionV();
// Increase tesselation based on the size. Should be approximately right?
// JPCSP is wrong at least because their method results in square loco roco.
patch_div_s = (spatch.count_u - 3) * patch_div_s / 3;
patch_div_t = (spatch.count_v - 3) * patch_div_t / 3;
if (patch_div_s == 0) patch_div_s = 1;
if (patch_div_t == 0) patch_div_t = 1;
// TODO: Remove this cap when spline_s has been optimized.
if (patch_div_s > 64) patch_div_s = 64;
if (patch_div_t > 64) patch_div_t = 64;
// First compute all the vertices and put them in an array
SimpleVertex *vertices = new SimpleVertex[(patch_div_s + 1) * (patch_div_t + 1)];
float tu_width = 1.0f + (spatch.count_u - 4) * 1.0f/3.0f;
float tv_height = 1.0f + (spatch.count_v - 4) * 1.0f/3.0f;
bool computeNormals = gstate.isLightingEnabled();
for (int tile_v = 0; tile_v < patch_div_t + 1; tile_v++) {
float v = ((float)tile_v * (float)(m - 2) / (float)(patch_div_t + 0.00001f)); // epsilon to prevent division by 0 in spline_s
for (int tile_u = 0; tile_u < patch_div_s + 1; tile_u++) {
float u = ((float)tile_u * (float)(n - 2) / (float)(patch_div_s + 0.00001f));
SimpleVertex *vert = &vertices[tile_v * (patch_div_s + 1) + tile_u];
vert->pos.SetZero();
if (origVertType & GE_VTYPE_NRM_MASK) {
vert->nrm.SetZero();
} else {
vert->nrm.SetZero();
vert->nrm.z = 1.0f;
}
if (origVertType & GE_VTYPE_COL_MASK) {
memset(vert->color, 0, 4);
} else {
memcpy(vert->color, spatch.points[0]->color, 4);
}
if (origVertType & GE_VTYPE_TC_MASK) {
vert->uv[0] = 0.0f;
vert->uv[1] = 0.0f;
} else {
vert->uv[0] = tu_width * ((float)tile_u / (float)patch_div_s);
vert->uv[1] = tv_height * ((float)tile_v / (float)patch_div_t);
}
// Collect influences from surrounding control points.
float u_weights[4];
float v_weights[4];
int iu = (int)u;
int iv = (int)v;
spline_n_4(iu, u, knot_u, u_weights);
spline_n_4(iv, v, knot_v, v_weights);
for (int ii = 0; ii < 4; ++ii) {
for (int jj = 0; jj < 4; ++jj) {
float u_spline = u_weights[ii];
float v_spline = v_weights[jj];
float f = u_spline * v_spline;
if (f > 0.0f) {
SimpleVertex *a = spatch.points[spatch.count_u * (iv + jj) + (iu + ii)];
vert->pos += a->pos * f;
if (origVertType & GE_VTYPE_TC_MASK) {
vert->uv[0] += a->uv[0] * f;
vert->uv[1] += a->uv[1] * f;
}
if (origVertType & GE_VTYPE_COL_MASK) {
vert->color[0] += a->color[0] * f;
vert->color[1] += a->color[1] * f;
vert->color[2] += a->color[2] * f;
vert->color[3] += a->color[3] * f;
}
if (origVertType & GE_VTYPE_NRM_MASK) {
vert->nrm += a->nrm * f;
}
}
}
}
if (origVertType & GE_VTYPE_NRM_MASK) {
vert->nrm.Normalize();
}
}
}
delete [] knot_u;
delete [] knot_v;
// Hacky normal generation through central difference.
if (gstate.isLightingEnabled() && (origVertType & GE_VTYPE_NRM_MASK) == 0) {
for (int v = 0; v < patch_div_t + 1; v++) {
for (int u = 0; u < patch_div_s + 1; u++) {
int l = std::max(0, u - 1);
int t = std::max(0, v - 1);
int r = std::min(patch_div_s, u + 1);
int b = std::min(patch_div_t, v + 1);
const Vec3f &right = vertices[v * (patch_div_s + 1) + r].pos - vertices[v * (patch_div_s + 1) + l].pos;
const Vec3f &down = vertices[b * (patch_div_s + 1) + u].pos - vertices[t * (patch_div_s + 1) + u].pos;
vertices[v * (patch_div_s + 1) + u].nrm = Cross(right, down).Normalized();
if (gstate.patchfacing & 1) {
vertices[v * (patch_div_s + 1) + u].nrm *= -1.0f;
}
}
}
}
// Tesselate. TODO: Use indices so we only need to emit 4 vertices per pair of triangles instead of six.
for (int tile_v = 0; tile_v < patch_div_t; ++tile_v) {
for (int tile_u = 0; tile_u < patch_div_s; ++tile_u) {
float u = ((float)tile_u / (float)patch_div_s);
float v = ((float)tile_v / (float)patch_div_t);
SimpleVertex *v0 = &vertices[tile_v * (patch_div_s + 1) + tile_u];
SimpleVertex *v1 = &vertices[tile_v * (patch_div_s + 1) + tile_u + 1];
SimpleVertex *v2 = &vertices[(tile_v + 1) * (patch_div_s + 1) + tile_u];
SimpleVertex *v3 = &vertices[(tile_v + 1) * (patch_div_s + 1) + tile_u + 1];
CopyQuad(dest, v0, v1, v2, v3);
count += 6;
}
}
delete [] vertices;
}
}